CM6800T Champion Microelectronic Corp., CM6800T Datasheet - Page 18

• Manufacturer Part Number: CM6800T
• Description: Epa/85+ Pfc+pwm Combo Controller Design For High Efficient Power Supply
• Manufacturer: Champion Microelectronic Corp.

http://www.championmicro.com.tw
2010/08/03
15
2
3
7
4
VFB
IAC
VRMS
ISENSE
RAMP1
2.5V
Rev. 1.2
+
-
GMv
MODULATOR
.
GAIN
16
VEAO
PFC
PFCCLK
Rmul
Rmul
+
-
GMi
.
Champion Microelectronic Corporation
PFC RAMP
.
1
Figure 1. PFC Section Block Diagram
IEAO
PFC CMP
+
-
ISENSE
VEAO
-1.0V
0.5V
VFB
0.3V
EPA/85+ PFC+PWM COMBO CONTROLLER
2.75V
VFB
CM6800T
PFC Tri-Fault
PFC ILIMIT
Green PFC
+
-
+
-
+
-
+
-
PFC OVP
Design for High Efficient Power Supply
.
(Turbo-Speed PFC+Green PWM)
16.5V
Zener
S
R
S
R
Q
Q
Q
Q
REFERENCE
7.5V
13
VCC
MPPFC
MNPFC
VCC
PFC OUT
ZENER
VREF
17V
18
14
12